linux-kernel - [PATCH 5/5] arm64: dts: qcom: qrb2210-rb1: add HDMI/I2S audio playback support

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Message-Id: <20250302-rb1_hdmi_sound_first-v1-5-81a87ae1503c@linaro.org>
Date: Sun, 02 Mar 2025 02:49:55 +0000
From: Alexey Klimov <alexey.klimov@...aro.org>
To: Bjorn Andersson <andersson@...nel.org>, 
 Linus Walleij <linus.walleij@...aro.org>, Rob Herring <robh@...nel.org>, 
 Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, Konrad Dybcio <konradybcio@...nel.org>, 
 Srinivas Kandagatla <srinivas.kandagatla@...aro.org>, 
 Liam Girdwood <lgirdwood@...il.com>, Mark Brown <broonie@...nel.org>
Cc: linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org, 
 linux-kernel@...r.kernel.org, linux-sound@...r.kernel.org, 
 Alexey Klimov <alexey.klimov@...aro.org>
Subject: [PATCH 5/5] arm64: dts: qcom: qrb2210-rb1: add HDMI/I2S audio
 playback support

Add sound node and dsp-related pieces to enable HDMI+I2S audio playback
support on Qualcomm QR2210 RB1 board. That is the only sound output
supported for now.

The audio playback is verified using the following commands:
amixer -c0 cset iface=MIXER,name='SEC_MI2S_RX Audio Mixer MultiMedia1' 1
aplay -D hw:0,0 /usr/share/sounds/alsa/Front_Center.wav

Cc: Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
Signed-off-by: Alexey Klimov <alexey.klimov@...aro.org>
---
 arch/arm64/boot/dts/qcom/qrb2210-rb1.dts | 49 ++++++++++++++++++++++++++++++++
 1 file changed, 49 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/qrb2210-rb1.dts b/arch/arm64/boot/dts/qcom/qrb2210-rb1.dts
index 7a789b41c2f1887f0c41ae24da2e2fe8915ab13c..e547537cffdbc13cfd21b8b8b7210b62996ff431 100644
--- a/arch/arm64/boot/dts/qcom/qrb2210-rb1.dts
+++ b/arch/arm64/boot/dts/qcom/qrb2210-rb1.dts
@@ -186,6 +186,47 @@ vph_pwr: regulator-vph-pwr {
 		regulator-always-on;
 		regulator-boot-on;
 	};
+
+	sound {
+		compatible = "qcom,qrb2210-rb1-sndcard", "qcom,qrb4210-rb2-sndcard";
+		pinctrl-0 = <&lpi_i2s2_active>;
+		pinctrl-names = "default";
+		model = "Qualcomm-RB1-WSA8815-Speakers-DMIC0";
+		audio-routing = "MM_DL1", "MultiMedia1 Playback",
+				"MM_DL2", "MultiMedia2 Playback";
+
+		mm1-dai-link {
+			link-name = "MultiMedia1";
+
+			cpu {
+				sound-dai = <&q6asmdai MSM_FRONTEND_DAI_MULTIMEDIA1>;
+			};
+		};
+
+		mm2-dai-link {
+			link-name = "MultiMedia2";
+
+			cpu {
+				sound-dai = <&q6asmdai MSM_FRONTEND_DAI_MULTIMEDIA2>;
+			};
+		};
+
+		hdmi-i2s-dai-link {
+			link-name = "HDMI/I2S Playback";
+
+			cpu {
+				sound-dai = <&q6afedai SECONDARY_MI2S_RX>;
+			};
+
+			platform {
+				sound-dai = <&q6routing>;
+			};
+
+			codec {
+				sound-dai = <&lt9611_codec 0>;
+			};
+		};
+	};
 };
 
 &cpu_pd0 {
@@ -321,6 +362,14 @@ &pm4125_vbus {
 	status = "okay";
 };
 
+/* SECONDARY I2S uses 1 I2S SD Line for audio on LT9611UXC HDMI Bridge */
+&q6afedai {
+	dai@18 {
+		reg = <SECONDARY_MI2S_RX>;
+		qcom,sd-lines = <0>;
+	};
+};
+
 &qupv3_id_0 {
 	status = "okay";
 };

-- 
2.47.2